Incident Overview
While cruising at 3,000 feet, the pilot observed an abrupt decrease in engine RPM from 2,200 to approximately 700. Unable to maintain level flight, the pilot identified a nearby private airstrip and initiated an emergency landing procedure.
Landing Attempt and Go-Around
The airplane made contact with the sod runway but bounced during the touchdown. At that moment, the pilot noticed a sudden increase in engine RPM. Realizing that the remaining runway length was insufficient to bring the aircraft to a stop, the pilot elected to execute a go-around. The airplane climbed to the height of the trees located at the departure end of the runway and subsequently settled into the treeline.
Post-Event Examination
A thorough examination of the airplane revealed that black electrical tape was lodged within the carburetor induction system. Further inspection disclosed that someone had wrapped black electrical tape around the flexible duct material located between the induction air filter and the carburetor. A review of approved aircraft maintenance procedures did not identify any authorized repair method that permitted the use of electrical tape for repairing the air duct.
Performance Data
According to normal aircraft performance data, the airplane required approximately 600 feet of ground roll for a landing and about 1,200 feet to clear a 50-foot obstacle during landing. The pilot reported that the sod runway measured 2,070 feet in length.